@article{00e377f14ff1472a9126d48c5929cb32,
title = "The pierre auger observatory scaler mode for the study of solar activity modulation of galactic cosmic rays",
abstract = "Since data-taking began in January 2004, the Pierre Auger Observatory has been recording the count rates of low energy secondary cosmic ray particles for the self-calibration of the ground detectors of its surface detector array. After correcting for atmospheric effects, modulations of galactic cosmic rays due to solar activity and transient events are observed. Temporal variations related with the activity of the heliosphere can be determined with high accuracy due to the high total count rates. In this study, the available data are presented together with an analysis focused on the observation of Forbush decreases, where a strong correlation with neutron monitor data is found.",
keywords = "Cherenkov detectors, Large detector systems for particle and astroparticle physics, Particle detectors",
author = "{The Pierre Auger Collaboration} and P. Abreu and M. Aglietta and Ahn, {E. J.} and D. Allard and I. Allekotte and J. Allen and {Alvarez Castillo}, J. and J. Alvarez-Mu{\~n}iz and M. Ambrosio and A. Aminaei and L. Anchordoqui and S. Andringa and T. Anti{\v c}i{\'c} and A. Anzalone and C. Aramo and E. Arganda and K. Arisaka and F. Arqueros and H. Asorey and P. Assis and J. Aublin and M. Ave and M. Avenier and G. Avila and T. B{\"a}cker and D. Badagnani and M. Balzer and Barber, {K. B.} and Barbosa, {A. F.} and R. Bardenet and Barroso, {S. L.C.} and B. Baughman and Beatty, {J. J.} and Becker, {B. R.} and Becker, {K. H.} and A. Bell{\'e}toile and Bellido, {J. A.} and S. BenZvi and C. Berat and T. Bergmann and X. Bertou and Biermann, {P. L.} and P. Billoir and F. Blanco and M. Blanco and C. Bleve and H. Bl{\"u}mer and M. Boh{\'a}{\v c}ov{\'a} and G. Farrar and I. Zaw",
note = "Funding Information: The successful installation and commissioning of the Pierre Auger Observatory would not have been possible without the strong commitment and effort from the technical and administrative staff in Malarg{\"u}e. We are grateful to Prof. Enrique G. Cordaro and the Observatorio Radiaci{\'o}n C{\'o}smica of the Universidad de Chile, who kindly provided the neutron monitor data of Los Cerrillos Observatory. We are very grateful to the following agencies and organizations for financial support: Comisi{\'o}n Nacional de Energ{\'i}a At{\'o}mica, Fundaci{\'o}n Antorchas, Gobierno De La Provincia de Mendoza, Municipalidad de Malarg{\"u}e, NDM Holdings and Valle Las Le{\~n}as, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico (CNPq), Financiadora de Estudos e Projetos (FINEP), Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado de Rio de Janeiro (FAPERJ), Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado de S{\~a}o Paulo (FAPESP), Minist{\'e}rio de Ci{\^e}ncia e Tecnologia (MCT), Brazil; AVCR AV0Z10100502 and AV0Z10100522, GAAV KJB300100801 and KJB100100904, MSMT-CR LA08016, LC527, 1M06002, and MSM0021620859, Czech Republic; Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS), Conseil R{\'e}gional Ile-de-France, D{\'e}partement Physique Nucl{\'e}aire et Corpusculaire (PNC-IN2P3/CNRS), D{\'e}partement Sciences de l{\textquoteright}Univers (SDU-INSU/CNRS), France; Bundesministerium f{\"u}r Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Finanzministerium Baden- W{\"u}rttemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Ministerium f{\"u}r Wissenschaft und Forschung, Nordrhein-Westfalen, Ministerium f{\"u}r Wissenschaft, Forschung und Kunst, Baden-W{\"u}rttemberg, Germany; Istituto Nazionale di Fisica Nucleare (INFN), Istituto Nazionale di Astrofisica (INAF), Ministero dell{\textquoteright}Istruzione, dell{\textquoteright}Universit{\`a} e della Ricerca (MIUR), Italy; Consejo Nacional de Ciencia y Tecnolog{\'i}a (CONACYT), Mexico; Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands; Ministry of Science and Higher Education, Grant Nos. 1 P03 D 014 30 and N N202 207238, Poland; Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia, Portugal; Ministry for Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia; Comunidad de Madrid, Consejer{\'i}a de Educaci{\'o}n de la Comunidad de Castilla La Mancha, FEDER funds, Ministerio de Ciencia e Innovaci{\'o}n and Consolider-Ingenio 2010 (CPAN), Generalitat Valenciana, Junta de Andaluc{\'i}a, Xunta de Galicia, Spain; Science and Technology Facilities Council, United Kingdom; Department of Energy, Contract Nos. DE-AC02-07CH11359, DE-FR02-04ER41300, National Science Foundation, Grant No. 0450696, The Grainger Foundation USA; ALFA-EC / HELEN, European Union 6th Framework Program, Grant No. MEIF-CT-2005-025057, European Union 7th Framework Program, Grant No. PIEF-GA-2008-220240, and UNESCO. Publisher Copyright: {\textcopyright} 2011 IOP Publishing Ltd and SISSA.",
year = "2011",
doi = "10.1088/1748-0221/6/01/P01003",
language = "English (US)",
volume = "6",
journal = "Journal of Instrumentation",
issn = "1748-0221",
publisher = "IOP Publishing Ltd.",
number = "1",
}